Furnace



May 17, 1938. H. G. VAN METER FURNACE Filed May 9, 1936 2 Sheets-Sheet l glwucntom fl. 6. Vila/Wafer Sttoxwu;

May 17, 1938. H. G. VAN METER 2,117,924

FURNACE Filed May 9, 1936 2 Sheets-Sheet 2 Snow/MA Patented May 17, 1938 UNITED STATES PATENT OFFICE .1125; itfitif'itittiitfts 1 Claim.

This invention relates to furnaces, and it is an object of the invention to provide a furnace having two vertically spaced heating chambers both horizontally disposed and in desired communication one with the other, the upper chamber constituting the primary heating chamber and the lower chamber constituting the secondary heating chamber. 7

It is also an object of the invention to provide a furnace of this kind comprising an upper primary heating chamber and a lower secondary heating chamber one in communication with, the other, the upper or primary chamber having means therein to eifect a spreading of the flame therein to assure maximum heating eillciency by the fuel. I

The invention also has for an object to provide a furnace of this kind which can be readily. employed for heating air or water or other fluid, together with means whereby the heating chambers comprised in the furnace are eii'ectively maintained in desired assembled relation.

The invention consists in the details of construction and in the combination and arrangementoi the several parts of my improved furnace whereby certain important advantages are attained and the device rendered simpler, less expensive and otherwise more convenient and advantageous for as will be hereinafter more fully set forth.

The novel features of my invention will hereinafter be definitely claimed,

In order that my invention may be the better understood, I will now proceed to describe the same with reference to the accompanying drawings, wherein:-

Figure 1 is a longitudinal vertical sectional view taken through an embodiment of my invention as comprised in a hot air furnace:

Figure 2 is a vertical sectional view taken substantially on the line 2-2 of Figure 1 looking in the direction of the arrow;

Figure 3 is a horizontal sectional view taken substantially on the line 1-4 of Figure 1 looking in the direction of the arrow:

Figure 4 is a longitudinal vertical sectional view taken through a furnace constructed in accordance with another embodiment of my invention;

Figure 5 is a sectional view taken substantially on the line 5-5 of Figure 4;

Figure 6 is a vertical sectional view taken transversely through a furnace constructed in accordance with a still further embodiment of my invention. a

In the form of invention as illustrated in Figures 1 to 3 my improved furnace comprises an uppercylindrical member I and a lower'cylindrlcal member 2 of desired dimensions and in parallel relation. The upper member I provides a primary heating chamber A and the lower member 2 provides a secondary heating chamber B. The front end of the upper member I is closed by a head 3 provided with a lining 4 of fire brick and extending through the head 3 and lining 4 is an oil nozzle 5 leading from a suitable source of oil supply. This nozzle 5 extends inwardly of the upper or primary heating chamber A and between two baiile plates 6 and I. The plates I and 1 are vertically spaced and extend entirely across the chamber A with the upper plate 6 terminating a distance inwardly from the rear end of the lower plate 1. These plates 6 and 1 are preferably of cast iron and are held in assembled position in any manner preferred.

Intel-posed between the side marginal portions of the plates 6 and 1 are the series of longitudinaliy spaced fire bricks 8 there being one of such series at each side. These fire bricks, as herein disclosed, are rectangular in form and are disposed transversely on an angle of approximately thirty degrees although I do not wish to limit myself in this respect. At a point directly in advance of the nozzle 5 and at a point'beyond the longitudinal centers of the plates 6 and I is arranged a fire brick 9. This brick 9 is also rectangular in form with its flat faces at right angles to the longitudinal center of either of the plates 6 and 1.

In advance of this brick 9 and at opposite sides of its transverse center are provided the additional fire bricks Ill. There are preferably two of these bricks at each side of the brick I also rectangular in cross section and with their flat faces arranged at about an angle of forty-five degrees with respect to the forward or front flat face of the brick 9.

These several bricks 8, 9 and ill provide means for effectively spreading the flame from the nozzle 5 within the primary heating chamber A due, as is believed to be apparent, to the baiiiing action of the bricks. These bricks I, 9 and III also retain the heat thus further assuring the creation and maintenance of an intense heat within the chamber A.

The chamber A through its lower wall at its forward portion is in communication through the coupling II with the upper forward portion of the lower or secondary heating chamber 3 and the products of combustion are drawn down into and through this lower or secondary heating chamber B by the draft created through the flue F. This flue F communicates with the lower portion of the chamber 13 through the rear or back head l2 thereof.

Interposed within the lower portion of the chamber B are the oppositely directed baflie plates l4 and IS, the upper plate [4 extending inwardly from the front head IQ of the chamber B while the lower plate l5 extends inwardly from the rear head (2 at a point preferably immediately v above the point of communication of the flue F with the chamber B. These baflle plates l4 and I5 cause the products of combustion to travel in a tortuous path through the secondary heating chamber B thus assuring maximum of heating eiliciency.

The members I and 2 are maintained in desired assembled relation by the standards 8 arranged fore and aft of the members I and 2 at opposite sides thereof. Each of these standards S at suitable positions thereon are disposed on outbows, as at ll, of such radii to snugly receive the adjacent portions of the members I and 2. Each pair of standards S are held in clamping engagement upon the members I and 2 by the interposed stay bolts l8.

In Figures 1, 2 and 3 I illustrate the members I and 2 as arranged within an enclosing casing or-housing H, certain of the walls of which being provided in their lower portions with air inlet openings I9 while the upper portion of this casing or housing H is formed, as at 20, to allow for the desired carrying off of the air heated within the casing or housing H.

' The embodiment of the invention as in trated in Figures 4 and 5 is substantially the same as that hereinbefore set forth with respect to the first form of my. invention except that the upper member I' at its forward portionand to one side of its vertical center has in communication therewith, as at 2|, an end portion of aleg 23 of a substantially U-shaped conduit 24. This conduit 24 is horizontally disposed and is of desired dimensions and has its second side leg 25 in communication, as at 26, with the lower member 2' through the forward upper portion thereof and to the side of the vertical center opposite to the point of communication of the leg 23 with the upper member I. This conduit 24 provides a further path of travel for the products of combustion as drawn from the upper or primary heating chamber I whereby the air within the casing or housing H is further heated.

The embodiment of the invention as illustrated in Figure 6 is substantially the same as the first embodiment except that the members I and 2 are surrounded by the spaced jacket 21 providing a water space 28. The supporting standards 8- dlrectly coact with this jacket 21. In this embodiment of the invention a hot water furnace is provided or with equal facility vapor or other fluid may be heated.

From the foregoing description it is thought to be obvious that a furnace constructed in accordance with my invention is particularly well adapted for use by reason of the convenience and facility with which it may be assembled and operated, and itwill also be obvious that my invention is susceptible of some change and modification without departing from the principles and spirit thereof and for this reason I do not wish to be understood as limiting myself to the precise arrangement and formation of the several parts herein shown in carrying out my invention in practice except as hereinafter claimed.

I claim: I

A heating unit comprising two vertically spaced heating chambers in communication with each other, a'discharge flue connected to the lower portion of the bottom chambena pair of horizontally disposed vertically spaced apart plates in the upper chamber extending across the width of said chamber, said plates having their front ends abutting against the front wall of the upper chamber and their rear or inner ends spaced inwardly from the rear wall of the upper chamber, a plurality of vertically disposed baflle members positioned adjacent the side edges of said plates and extending inwardly thereof in parallel planes and at an oblique angle to the flow of gases through the upper chamber, a fuel nozzle extending through the front wall of the upper chamber, a substantially centrally disposed baffle in the upper chamber confronting said nozzle and a second series of vertical baffles extending forwardly of said latter ballle and disposed inwardly of said first named vertical bailles.

- HARRY G. VAN METER. 

